sodium benzenesulfonate
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| ImageFile = Sodium benzenesulfonate.svg
| ImageSize = 150px
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| IUPACName =
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|Section1={{Chembox Identifiers
| CASNo = 515-42-4
| ChemSpiderID = 10139
| EC_number = 208-198-2
| PubChem = 517327
| RTECS = | DrugBank = DB7350000
| UNII = K5RM14AZHX
| StdInChI=1S/C6H6O3S.Na/c7-10(8,9)6-4-2-1-3-5-6;/h1-5H,(H,7,8,9);/q;+1/p-1
| StdInChIKey = MZSDGDXXBZSFTG-UHFFFAOYSA-M
| SMILES = C1=CC=C(C=C1)S(=O)(=O)[O-].[Na+]
}}
|Section2={{Chembox Properties
| C=6|H=5|O=3|S=1|Na=1
| MolarMass =
| Appearance = white solid
| Density =
| MeltingPtC = 450
| MeltingPt_notes = decomposition
| BoilingPt =
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|Section3={{Chembox Hazards
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| FlashPt =
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}}
Sodium benzenesulfonate is an organic compound with the formula {{chem2|C6H5SO3Na}}. It is white, water-soluble solid, It is produced by the neutralization benzenesulfonic acid with sodium hydroxide. It is also a common ingredient in some detergents. The compound typically crystallizes from water as the monohydrate.{{Ullmann|author=Otto Lindner |author2=Lars Rodefeld |title=Benzenesulfonic Acids and Their Derivatives|year=2005|doi=10.1002/14356007.a03_507}}
Heating this salt in strong base results in desulfonation, giving, after acid workup, phenol{{cite journal |doi=10.15227/orgsyn.003.0037|title=p-Cresol |journal=Organic Syntheses |year=1923 |volume=3 |page=37|author=W. W. Hartman}} This reaction was at one time, the principal route to phenol.